Metal Gear Solid 4: Guns of the Patriots Walkthrough & Strategy Guide

You hit the streets behind another militia front as they battle with the PMC soldiers. A cut scene shows the militia roll up with a tank, pushing northeast on a street ahead. From behind the militia trench, duck down and look for an opening in the left wall that leads to some ruined buildings. You can creep north through the buildings, hopping through windows to reach the street behind the tank. From there, get down on the northern sidewalk and crawl northeast, staying just behind the tank to let it clear the way.

The tank inevitably gets blown up (it rolls backwards, so don't be right behind it like we were), but the militia is still successful in pushing back the PMC forces, Just stay behind the militia and stick to the left-side sidewalk until you reach an open alley on your left (west). Quietly climb the ladder on the building just inside the alley and, when you reach the top, look right to spot a PMC sniper looking down at the battlefield. You can hold him up quickly, but since this is a war zone scene he won't stay down—knock him out or tranquilize him to disable him permanently.

Just around the corner on the same rooftop is a javelin missile launcher you should collect. You can also cross a sky bridge to another rooftop for a ration, or just climb back down the ladder to return to the street level. Follow the alley behind the building while hugging the floor, as just north of the building where you disabled the sniper is a pair of PMC soldiers behind some cover. They're on ground level, so can quite easily send in the Mk. II bot to zap 'em both from behind and permanently stun them.

The skirmish should end at that point (or soon thereafter) and the militia forces will celebrate. Look for a ladder just north of the position of those final two PMCs and climb it to a balcony that leads behind the building and drops Snake into a backroad that loads a new area and a cut scene.